Digital toning instrument



FIG. 1 is a perspective view of a digital toning instrument showing our new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof,

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom elevation view thereof. 

The ornamental design for a digital toning instrument, as shown and described. 